What is the purpose of the VCC pin next to the UART in the HDD?

Question

Iron

It’s actually interesting for what purposes it is needed, if with uart and the console it’s more or less clear then it’s not with it, it’s even often not indicated in the hacker guide. Interested in where else you can dig in this direction, commands, cutting firmware, etc.

Answer 1

Референсное напряжение для UART. Чтобы UART адаптер знал, какое напряжение принимать за логическую единицу. Зачастую 5в или 3.3в

Answer 2

+5 V